def __init__(self):
self.marco = Marco() #Own instance of Marco
class MarcoBinding(DatagramProtocol):
"""
Twisted class for an asynchronous socket server
"""
def __init__(self):
self.marco = Marco() #Own instance of Marco
def __del__(self):
del self.marco
def graceful_shutdown(self):
logging.info('Stopping service marcod')
def startProtocol(self):
reactor.addSystemEventTrigger('before', 'shutdown', self.graceful_shutdown)
def marcoInThread(self, command, address):
nodes = []
nodes = self.marco.marco(max_nodes=command.get("max_nodes", None),
exclude=command.get("exclude", []),
timeout=command.get("timeout", None),
params=command.get("params", {}),
group=command.get("group", conf.MULTICAST_ADDR)
)
self.transport.write(json.dumps([{"Address":n.address, "Params": n.params} for n in nodes]).encode('utf-8'), address)
def requestForInThread(self, command, address):
nodes = self.marco.request_for(command["Params"],
max_nodes=command.get("max_nodes", None),
exclude=command.get("exclude", []),
params=command.get("params", {}),
timeout=command.get("timeout", None))
if len(nodes) > 0:
self.transport.write(json.dumps(
[{"Address": n.address, "Params": n.params} for n in nodes]).encode('utf-8'),
address)
else:
self.transport.write(json.dumps([]).encode('utf-8'), address)
def servicesInThread(self, command, address):
services = self.marco.services(addr=command.get("node", None),
timeout=command.get("timeout", 0)
)
self.transport.write(json.dumps([service for service in services]).encode('utf-8'), address)
def datagramReceived(self, data, address):
try:
command = json.loads(data.decode('utf-8'))
except ValueError:
return
if command.get("Command", None) == None:
self.transport.write(json.dumps({"Error": True}).encode('utf-8'), address)
else:
if command["Command"] == "Marco":
reactor.callInThread(self.marcoInThread, command, address)
elif command["Command"] == "Request-for" or command["Command"] == "Request-For":
reactor.callInThread(self.requestForInThread, command, address)
elif command["Command"] == "Services":
reactor.callInThread(self.servicesInThread, command, address)
else:
self.transport.write(json.dumps({"Error": True}).encode('utf-8'), address)